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/*
* blogc: A blog compiler.
* Copyright (C) 2015-2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#include <stdio.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <dirent.h>
#include <time.h>
#include <libgen.h>
#include "../common/utils.h"
#include "../common/stdin.h"
#include "pre-receive-parser.h"
#include "pre-receive.h"
static unsigned int
cpu_count(void)
{
#ifdef _SC_NPROCESSORS_ONLN
long num = sysconf(_SC_NPROCESSORS_ONLN);
if (num >= 1)
return (unsigned int) num;
#endif
return 1;
}
static void
rmdir_recursive(const char *dir)
{
struct stat buf;
if (0 != stat(dir, &buf)) {
fprintf(stderr, "warning: failed to remove directory (%s): %s\n", dir,
strerror(errno));
return;
}
if (!S_ISDIR(buf.st_mode)) {
fprintf(stderr, "error: trying to remove invalid directory: %s\n", dir);
exit(2);
}
DIR *d = opendir(dir);
if (d == NULL) {
fprintf(stderr, "error: failed to open directory: %s\n",
strerror(errno));
exit(2);
}
struct dirent *e;
while (NULL != (e = readdir(d))) {
if ((0 == strcmp(e->d_name, ".")) || (0 == strcmp(e->d_name, "..")))
continue;
char *f = bc_strdup_printf("%s/%s", dir, e->d_name);
if (0 != stat(f, &buf)) {
fprintf(stderr, "error: failed to stat directory entry (%s): %s\n",
e->d_name, strerror(errno));
free(f);
exit(2);
}
if (S_ISDIR(buf.st_mode)) {
rmdir_recursive(f);
}
else if (0 != unlink(f)) {
fprintf(stderr, "error: failed to remove file (%s): %s\n", f,
strerror(errno));
free(f);
exit(2);
}
free(f);
}
if (0 != closedir(d)) {
fprintf(stderr, "error: failed to close directory: %s\n",
strerror(errno));
exit(2);
}
if (0 != rmdir(dir)) {
fprintf(stderr, "error: failed to remove directory: %s\n",
strerror(errno));
exit(2);
}
}
int
bgr_pre_receive_hook(int argc, char *argv[])
{
int rv = 0;
char *master = NULL;
if (isatty(STDIN_FILENO)) {
char *hooks_dir = dirname(argv[0]); // this was validated by main()
char *real_hooks_dir = realpath(hooks_dir, NULL);
if (real_hooks_dir == NULL) {
fprintf(stderr, "error: failed to guess repository root.\n");
return 1;
}
char *repo_dir = dirname(real_hooks_dir);
if (0 != chdir(repo_dir)) {
fprintf(stderr, "error: failed to change to repository root\n");
free(real_hooks_dir);
return 1;
}
char *htdocs_sym = bc_strdup_printf("%s/htdocs", repo_dir);
free(real_hooks_dir);
if (0 != access(htdocs_sym, F_OK)) {
fprintf(stderr, "error: no previous build found. nothing to "
"rebuild.\n");
return 1;
}
char *build_dir = realpath(htdocs_sym, NULL);
free(htdocs_sym);
if (build_dir == NULL) {
fprintf(stderr, "error: failed to get the hash of last built "
"commit.\n");
return 1;
}
char **pieces = bc_str_split(basename(build_dir), '-', 2);
free(build_dir);
if (bc_strv_length(pieces) != 2) {
fprintf(stderr, "error: failed to parse the hash of last built "
"commit.\n");
return 1;
}
master = bc_strdup(pieces[0]);
bc_strv_free(pieces);
}
else {
char *input = bc_stdin_read();
master = bgr_pre_receive_parse(input);
free(input);
}
if (master == NULL) {
fprintf(stderr, "warning: no reference to master branch found. "
"nothing to deploy.\n");
return rv;
}
char *repo_dir = NULL;
char *output_dir = NULL;
repo_dir = getcwd(NULL, 0);
if (repo_dir == NULL) {
fprintf(stderr, "error: failed to get repository path: %s\n",
strerror(errno));
rv = 1;
goto cleanup;
}
char dir[] = "/tmp/blogc_XXXXXX";
if (NULL == mkdtemp(dir)) {
rv = 1;
goto cleanup;
}
char *git_archive_cmd = bc_strdup_printf(
"git archive \"%s\" | tar -x -C \"%s\" -f -", master, dir);
if (0 != system(git_archive_cmd)) {
fprintf(stderr, "error: failed to extract git content to temporary "
"directory: %s\n", dir);
rv = 1;
free(git_archive_cmd);
goto cleanup;
}
free(git_archive_cmd);
if (0 != chdir(dir)) {
fprintf(stderr, "error: failed to chdir (%s): %s\n", dir,
strerror(errno));
rv = 1;
goto cleanup;
}
if ((0 != access("Makefile", F_OK)) && (0 != access("GNUMakefile", F_OK))) {
fprintf(stderr, "warning: no makefile found. skipping ...\n");
goto cleanup;
}
char *home = getenv("HOME");
if (home == NULL) {
fprintf(stderr, "error: failed to find user home path\n");
rv = 1;
goto cleanup;
}
const char *make_impl = NULL;
if (127 != WEXITSTATUS(system("gmake -f /dev/null 2> /dev/null > /dev/null"))) {
make_impl = "gmake";
}
else if (127 != WEXITSTATUS(system("make -f /dev/null 2> /dev/null > /dev/null"))) {
make_impl = "make";
}
if (make_impl == NULL) {
fprintf(stderr, "error: no 'make' implementation found\n");
rv = 1;
goto cleanup;
}
unsigned long epoch = time(NULL);
output_dir = bc_strdup_printf("%s/builds/%s-%lu", home, master, epoch);
if (0 == access(output_dir, F_OK)) {
char *tmp = output_dir;
output_dir = bc_strdup_printf("%s-", tmp);
free(tmp);
}
char *gmake_cmd = bc_strdup_printf(
"%s -j%d OUTPUT_DIR=\"%s\" BLOGC_GIT_RECEIVER=1", make_impl,
cpu_count(), output_dir);
fprintf(stdout, "running command: %s\n\n", gmake_cmd);
fflush(stdout);
if (0 != system(gmake_cmd)) {
fprintf(stderr, "error: failed to build website ...\n");
rmdir_recursive(output_dir);
free(gmake_cmd);
rv = 1;
goto cleanup;
}
free(gmake_cmd);
if (0 != chdir(repo_dir)) {
fprintf(stderr, "error: failed to chdir (%s): %s\n", repo_dir,
strerror(errno));
rmdir_recursive(output_dir);
rv = 1;
goto cleanup;
}
char *htdocs_sym = realpath("htdocs", NULL);
if ((htdocs_sym != NULL) && (0 != unlink("htdocs"))) {
fprintf(stderr, "error: failed to remove symlink (%s/htdocs): %s\n",
repo_dir, strerror(errno));
rmdir_recursive(output_dir);
rv = 1;
goto cleanup2;
}
if (0 != symlink(output_dir, "htdocs")) {
fprintf(stderr, "error: failed to create symlink (%s/htdocs): %s\n",
repo_dir, strerror(errno));
rmdir_recursive(output_dir);
rv = 1;
goto cleanup2;
}
if (htdocs_sym != NULL)
rmdir_recursive(htdocs_sym);
cleanup2:
free(htdocs_sym);
cleanup:
free(master);
free(output_dir);
rmdir_recursive(dir);
free(repo_dir);
return rv;
}
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